Ahhh..Good to see real Escapees opinions on this matter.
Well..if I were you..I dont know your age and his, but you got to set the record straight. You're both alcoholics, I dont want to judge or anything, but thats something that stands in the way here. If your drunk you cant make a well-thought decision. If the rage/need for violence your brother has runs in your family, I would stay away from you too when you drink!
My solution: TALK. Dont do stuff you normally wouldnt do. Do it in a moment when your both sober. Just say to him that you are not okay with him beating you to the hospital, and while you are at it, say you also dont like his previous actions. You let it go what happened in the past, but the jawbreaking was the final drop. Its gotta stop. If he cant get that..well...eh its been suggested to convince your parents to do something. If they wont..avoid him till he changes his behavior.
But, seriously, next time something happens, call the police and let them handle it. Say that to him.